Notice a lot of people above have given the nod to Metolious TCU's. Says something there.
Can't speak to the new design (haven't bought any new cams in ten years or so), but I always am using the blue, yellow, orange, and red tcu's (most of these are a 3-cam size.... )
My thoughts are the 3-cam sizes fit more places, better, than the 4-cam units.
Placements per weight ratio for TCU-type cams much higher than larger cams.
I prefer the u-cable setup on cams over the single stem... better dexterity while I'm making placements. I don't like the two finger triggers compared to the single, loop trigger on tcu's.
My thoughts...